Sol-gel TiO2/carbon paste electrode nanocomposites for electrochemical-assisted sensing of fipronil pesticide

Abstract

The unique study of TiO2 sol-gel modified carbon paste electrode (CPE) nanocomposites have been developed for electrochemical sensor detecting fipronil pesticide compound. We develop the easy synthesized TiO2 via a sol-gel method and modified in CPE which applied electrochemical system as cyclic voltammetry (CV) because the concentration is proportional with current peaks. We discover the TiO2 optimal mass used of 0.1 g which is compared with 0.7 g carbon and 0.3 mL paraffin. It has high-current anodic (Ipa) of 1.13×10 μA and high-current cathodic (Ip3c)-0.96×10 μA in scan rate of 0.5 V/s. The limit of detection (LOD) of fipronil has been determined of 34.0×103μM in percent recovery of 0.8%. Its high-stability for lifetime TiO-52-CPE nanocomposites was expressed for 13 days which mean that can be used for detecting fipronil pesticide.